Syringe



Mar. 27, 1923` W. H. BRUCE SYRINGE Filed Feb. 18, 1920 Snom/1430@Z/Vl'lil'am iace,

-N @NBN a Rozmu Patented Mar. 27, 1923.

UNITED STATES WILLIAM H. BRUCE, OF LANSDOVJNE, PENNYSLVANIA.

SYRINGE.

Application filed February 18, 1920.

To all whom t may concern:

Be it known that I, VILLIAM H. BRUCE, a citizen of the United States,and a resident 0f Lansdowne, county of Delaware, State of Pennsylvania,have invented certain new and useful Improvements in Syringes, of whichthe following is a speciiication, reference being had to theaccompanying drawings.

My invention relates particularly to that class of syringes in which thereservoir compri-ses a barrel having mounted therein a piston arrangedto be reciprocated to charge the reservoir and to discharge itscontents, and is especially directed to the form of piston employed.

The principal object of my invention is to provide a syringe with apiston arranged to deposit lubricant upon the inner walls of the barrelin which it reciprocates.

Other objects of my invention are to provide a. syringe with a pistonhaving a lubricant-containing chamber, and to provide said piston withmeansP for expelling the lubricant therein contained, f

My invention further comprehends a syringe having a piston comprising alubricant-containing chamber, and provided with means to prevent theescape of said lubricant during sterilization. I

The form of my invention as hereinafter described comprises a syringehaving a cylindrical barrel provided with a nozzle, and a hollow pistonwhose stem or rod projects exterior to said barrel, by which it may beconveniently reciprocated in a well known manner, said piston beingprovided with a follower in the chamber thereof, mounted to ride upon athreaded sleeve which is rotatablel to axially progress it in thedirection to force lubricant from said chamber through suitably disposedcontrollable outlets opening upon the inner walls of said barrel.

My invention also includes all of the va-A rious novel features ofconstruction and arrangement as hereinafter more definitely described.

In the accompanying drawings, Figure 1 is a central verticallongitudinal sectional view of a syringe conveniently embodying myinvention; Fig. 2 is a transverse sectional view of said syringe takenon the line 22 in Fig. 1; Fig. 3 is a transverse sectional view of saidsyringe taken on the line 3-3 in Fig. 1; and Fig. el is a trans- SerialNo. 359,635.

verse sectional view of said syringe taken on the line lf-4 in Fig. l.

In said figures, the syringe reservoir or barrel comprises thecylindrical shell 1 and heads 2 and 3, the head 2 having the stemaperture 5 and the head 3 having the passageway 6 opening through thenozzle 7.

rfhe reservoir or barrel may be charged and discharged by the hollowplunger or piston 9 arranged to be reciprocated therein by the stem orrod 10 extending through and exterior to the head 2 and terminating inthe handle or knob 11. Said piston 9 may preferably be cup-shaped, asshown in Fig. 1, to form the chamber 12 for lubricant such as grease,which is retained therein by the cap or closure 13 having thedistributing outlets 15 through which said lubricant may discharge on tothe inner surface of the shell 1 The lubricant in the chamber 12 may beymaintained under slight pressure by the follower disk 16 which ismounted for axial movement in said chamber upon the rotatable sleeve 17with which it is engaged in threaded relation, being prevented 'fromrotating therewith by the spline or feather 19, as shown in Figs. 1 and2.

Thefsleeve 17 rotatably embraces the stem or rod 10 and extends throughthe head 2, having the nut 2O by which it may be conveniently rotated toeffect the axial adjustment of the follower 16, and being itselfprevented from axial displacement by the flange 21 and collar 22respectively engaging the opposite sides of the cap or closure 13, asshown in Fig. 1.

rlhe cap or closure 13, as shown in Fig. 1,is

.in theaded engagement with the cylindrical walls of the cup-shaped bodyof the piston 9, the threaded portion being limited to the innerperipheral region, while the outer peripheral region is smooth andsnugly lits the free outer margin of the cylindrical walls of saidpiston 9 comprising the annular flange 25 through which apertures orports 26 extend normally in registry with the outlets 15, see Figs. 1and 3, but capable of being shifted out of registry by a relativerotation of said piston body 9 and its cap or closure 13.

It will be obvious that the shifting of the piston body 9 and its cap 13to close the ports 26, of the outlets 15 is highly advantageous as it soseals the lubricant-containing chamber 12 as to prevent escape of thelubricant during the process of sterilizing the syringe piston.

I do not desire to limit my invention to the precise details ofconstruction and arrangement as herein set forth, as it is obvious thatvarious modifications may be made therein without departing from the.

essential features of my invention as defined in the appended claims.

Having thus described my invention, I claim 1. A hollow piston having achamber for containing lubricant, and mechanism within said pistonarranged to be actuated independently of the actuation of said piston,to effect the discharge of said lubricant.

2. A hollow piston movable within a casing and having a chamber forcontaining lubricant, a followerl for said lubricant, and means operablewithout said reservoir for effecting the movement of said follower tocompress said lubricant.

3. A hollow piston mounted to reciprocate in a casing and having achamber provided with outlets, for containing lubricant, a rod for saidpiston extended through and exterior to said casing, a follower for saidlubricant, and a sleeve embracing said rod, in threaded engagement withsaid follower and operable from without said casing to effect the axialmovement of said follower, independently of the movement of said rod.

4. A hollow piston arranged to be reciprocated in a casing, and having achamber provided with outlets, for containing lubricant, a'follower forsaid lubricant,` and means extended exterior to said casing arranged toreciprocate with said piston, rotatable to move said follower axially insaid chamber.

5. A piston having a chamber provided with ports, a closure for saidchamber movable with respect to the piston walls, and having` outletscommunicating with said chamber, and arranged to register with saidports and adjustable to close said ports.

6. A piston having a chamber provided with ports, a closure for saidchamber in threaded engagement with the piston walls, and having outletscommunicating with said chamber and arranged to register with saidports, the relative rotation of. said closure and piston effectingclosure of said ports.

7. A hollow piston comprising cylindrical walls having a threadedregion, and a freesmooth marginal flange provided with ports, a stemengaged with said piston and extending exterior to said reservoir bywhich said piston may be reciprocated, a closure for said piston inthreaded engagement with said threaded zone having a smooth regionfitted snugly within the flange of the piston walls, and provided withoutlets communicating with the chamber in said piston and arranged toregister with said ports and to be rotated to control said ports, afollower in the chamber in said piston, a sleeve embracing said stem inthreaded engagement with said follower' In witness whereof, l havehereunto set my hand this 4th day of February, A. D., 1920.

l/VILLIAM H. BRUCE. y

Witnesses: l

WILLIAM J. RUSSELL, CLIFTON C. HALLowELL.

